Dispersion in free fall is an option for dry, free flowing products, which do not tend to agglomerate. Especially coarser or sensitive powders and granules are gently dispersed when accelerated by gravity on their way into the measuring zone. Together with the sensors HELOS and QICPIC for laboratory applications and inside MYTIS and PICTIS for industrial applications, GRADIS offers particle size and particle shape analyses in a size range from a few micrometers up to 10 millimeters. Elongated or curled fibres may even be much longer.
This unit is ideal for products that do not need a high dispersing energy, like crystals, sand or granules. The 50 cm long fall shaft provides smooth dispersion and control and homogenizes the speed of the particles presented to the laser beam. GRADIS is fed by VIBRI/L, the software controlled feeding device for all dry dispersing sensors. GRADIS is typically operated together with an extraction unit for the particle collection and the generation of the laminar air flow. If required, the sample can be collected and re-used after the analysis.